astrophysics Flashcards
describe planet orbit
slightly elliptical
orbit in same plane
same direction
describe moon orbit
circular path
describe comet orbit
highly elliptical
what’s absolute magnitude
how bright a star would be if their distance from earth was equal
what magnitude does a start have if it’s bright
smaller magnitude
what magnitude does a start have if it’s not bright
larger magnitude
what’s the big bang theory
started from single point
was hot and dense
giant explosion
caused universe to expand
how CMBR proves big bang theory
moves in all directions
as universe expands wavelength decrease
how does red shift prove big bang
most distant galaxies move away quickest
expansion of universe
what happens when light moves towards you
light is bluer
wave is squashed
wavelength shifts to blue end
what happens when light moves away from you
light is redder
wave is stretched
wavelength shifts to red end
